add directory gnu

gnu/glibc/glibc-1.03/sysdeps/vax/strcmp.s

@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 1983 Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that: (1) source distributions retain this entire copyright
+ * notice and comment, and (2) distributions including binaries display
+ * the following acknowledgement:  ``This product includes software
+ * developed by the University of California, Berkeley and its contributors''
+ * in the documentation or other materials provided with the distribution
+ * and in all advertising materials mentioning features or use of this
+ * software. Neither the name of the University nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+	.asciz "@(#)strcmp.s	5.6 (Berkeley) 6/1/90"
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * Compare string s1 lexicographically to string s2.
+ * Return:
+ *	0	s1 == s2
+ *	> 0	s1 > s2
+ *	< 0	s2 < s2
+ *
+ * strcmp(s1, s2)
+ *	char *s1, *s2;
+ */
+#include "DEFS.h"
+
+ENTRY(strcmp, 0)
+	movl	4(ap),r1	# r1 = s1
+	movl	8(ap),r3	# r3 = s2
+	subb3	(r3),(r1),r0	# quick check for first char different
+	beql	1f		# have to keep checking
+	cvtbl	r0,r0
+	ret
+1:
+	clrl	r5		# calculate min bytes to next page boundry
+	subb3	r1,$255,r5	# r5 = (bytes - 1) to end of page for s1
+	subb3	r3,$255,r0	# r0 = (bytes - 1) to end of page for s2
+	cmpb	r0,r5		# r5 = min(r0, r5);
+	bgtru	2f
+	movb	r0,r5
+2:
+	incl	r5		# r5 = min bytes to next page boundry
+	cmpc3	r5,(r1),(r3)	# compare strings
+	bneq	3f
+	subl2	r5,r1		# check if found null yet
+	locc	$0,r5,(r1)
+	beql	1b		# not yet done, continue checking
+	subl2	r0,r3
+	mnegb	(r3),r0		# r0 = '\0' - *s2
+	cvtbl	r0,r0
+	ret
+3:
+	subl2	r0,r5		# check for null in matching string
+	subl2	r5,r1
+	locc	$0,r5,(r1)
+	bneq	4f
+	subb3	(r3),(r1),r0	# r0 = *s1 - *s2
+	cvtbl	r0,r0
+	ret
+4:
+	clrl	r0		# both the same to null
+	ret